12436649 has 4 divisors (see below), whose sum is σ = 12491664. Its totient is φ = 12381636.

The previous prime is 12436603. The next prime is 12436651. The reversal of 12436649 is 94663421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94663421 = 1097 ⋅86293.

It is a cyclic number.

It is not a de Polignac number, because 12436649 - 2¹⁶ = 12371113 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (12436049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27167 + ... + 27620.

It is an arithmetic number, because the mean of its divisors is an integer number (3122916).

Almost surely, 2^12436649 is an apocalyptic number.

It is an amenable number.

12436649 is a deficient number, since it is larger than the sum of its proper divisors (55015).

12436649 is an equidigital number, since it uses as much as digits as its factorization.

12436649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55014.

The product of its digits is 31104, while the sum is 35.

The square root of 12436649 is about 3526.5633412715. The cubic root of 12436649 is about 231.6867117437.

The spelling of 12436649 in words is "twelve million, four hundred thirty-six thousand, six hundred forty-nine".